磁性斜发沸石对溶液中Pb^(2+)的吸附性能  

Adsorption of Lead Ions by Magnetic Clinoptilolite

作　　者：张伟 王维清[2] 王德志[2] 张杰[2] 

机构地区：[1]西南科技大学分析测试中心,四川绵阳621010 [2]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《安徽农业科学》2015年第27期206-208,267,共4页Journal of Anhui Agricultural Sciences

基　　金：西南科技大学分析测试中心科研项目

摘　　要：利用磁性斜发沸石作吸附剂,考察了含背景电解质溶液初始p H、吸附剂投加量、Pb2+初始浓度、吸附时间等对其吸附Pb2+的影响,通过动力学模型和等温吸附模型探讨了磁性斜发沸石吸附Pb2+可能的作用机制。结果表明,磁性斜发沸石能够有效去除水体中的Pb2+,最大吸容附量达136.1 mg/g。磁性斜发沸石对Pb2+的吸附平衡时间为48 h,溶液p H=6.0左右时,吸附剂投加量增大有利于Pb2+的去除;随着溶液中Na NO3背景电解质浓度增大,磁性斜发沸石对Pb2+的吸附量显著降低;吸附行为符合准二级动力学模型及Langmuir等温吸附模型。推测磁性斜发沸石对Pb2+的吸附既有物理吸附又有化学吸附。The batch of experiments was conducted to remove the lead ions from solutions on magnetic clinoptilolite. The influence of solution pH, adsorbent dosage, initial lead ions concentration and contact time were investigated. The experimental results showed that lead ions removal rate increased with tho increase of adsorbent dosage, pH at 6.0. The adsorption process fits pseudo-second-order kinetic model and Langmuir isotherm equation, and the maximum adsorption capacity for lead ions was 136.1 mg/g. Speculation for the behavior of lead ions ad- sorption by magnetic clinoptilolite was both physical adsorption and chemical adsorption. The result suggested that the magnetic clinoptilolite may be potential application for wastewater treatment.

关 键 词：磁性斜发沸石 PB2+ 吸附 动力学 等温吸附 

分 类 号：S181.3[农业科学—农业基础科学]